William b



(No Model.) S

W. E. GWYER.

Governor for Vulcanizing Apparatus. No. 239,490. PatentedMarh 29,1881.

- INVEN-TDB:

ATTORNEYS.

. WITNESSES:

. KW; 5.931% XQMJW UNITED STATES PATENT OFFIC WILLIAM E. GWYER, OF NEW YORK, N. Y.

GOVERNOR FOR VULCANEZING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 239,490, dated March 29, 11881.

Application filed February 24, 1881. (N model.)

To all whom ct may concern:

Beitknown that I, WILLIAM E. GwYER, of the city, county, and State of New York, have invented a new and useful Improvement in Governors for Vulcanizin g Apparatus, of which the following is a specification.

My improvements relate to governors for regulating the flow of gas to the steam-generators of vulcanizing apparatus, by which the temperature in the vulcanizing-chamber is maintained at a uniform point.

- The object of this invention is to utilize an ordinary pressurediaphragm for that purpose, and also to allowescape from the steam-space 1 or steam-generator of expanded air, which, when allowed to remain, interferes with the proper indication of the pressure.

In the accompanyingdrawings, forming part of this specification, Figure 1 is a sectional elcvation of the governor. Fig. 2 is a face view of the same, and Fig. 3 is a cross-section of the gas-cock.

Similar letters of reference indicate corresponding parts.

A is a hollow plug, adapted for connection, by a pipe or otherwise, with the shell of the steam-generator of the vulcanizer, (shown by dotted lines,) which is of usual construction.

The upper end of the tube is formed or fitted with chambered. enlargement a, of circular form, in which a circular flexible diaphragm, b, of ordinary character, is held by the faceplate 0 that covers the chamber.

g is a lever pivoted onthe face-plate 0 and fitted with a screw, h, that extends through a central aperture in plate 0, and bears upon the diaphragm b.

i is the gas-cock fitted in the gas-supply pipe it, between the source of supply and the burners,(not shown,) and having its stem d connected with the lever g. The valve shown is constructed to cut off and to open the gas-pipe by a limited extent of movement, for which purpose the valve-case l separates the gas-pipje, and the separated ends connect with passages m m that extend to the face of the valve-seat. The valve n is a disk on the end of stem d, which carries a spiral spring, e, tending to re tain the valve off from its seat, and thus allow 50 communication between the passages m.

The passage in plug A communicates with valve to its seat.

the space at the back of diaphragm b, so that the steam has access thereto, and it will be seen that the tendency of pressure on the diaphragm is to move the lever g outward, thus moving stem d in the direction to close the At one side of plug A, and communicating with the passage therein, the relief-cock B is placed. This cock consists of a chambered case, 0, in which is fitted a disk-valve, 12, having a stem, q, that extends through a central aperture in the cap 0 of the valvecase. The stem (1 is grooved lengthwise, as shown at q, to allow escape of air from the case. The valve 19 has suitable packing on its face to close tightly against the under side of cap 0, and the valve is placed to fall and open the passage g by gravity.

In operation, the burners beinglighted under the generator, the air therein, or in the steamspace of the vulcanizer, is first heated and, by its expansion, passes through the cock B, until the steam-pressure is sufiicient to close the valve 19, by which time the air will have nearly all escaped. As the pressure of steam increases the lever g is moved, by the action of diaphragm 1), until the pressure reaches the point at which the apparatus is set, when the valve 9?. will have checked the flow of gas to the minimum amount. The heat of the generator being thus reduced, the steam pressure-falls, diaphragm b reacts, and the gas-cock opens. The diaphragm b will act correctly according to steampressure, on account of the absence of expanded 8 air, which, in the comparatively small steamspace ofa vulcanizer, is an important factor for pressure. The correct ratio between pressure and heat can therefore be obtained.

There may be a loose connection between lever g and stem 01, so that the lever may move a certain distance outward before producing any effect on the stem.

An ordinary cock, r, is fitted in the couplingthimble of cock B, so that the passage can be 5 closed by hand, if desired. This may be done when steam is raised, in order to prevent wear of the relief-valve and leakage of steam.

Having thus fully described my invention, 1 claim as new and desire to secure by'Letters :00 Patent-- '1. In governors for vulcanizing apparatus,

the flexible pressure-diaphragm b, lever g, 1 toinatic relief cook or valve for escape of air and gas-cock having its stem connected with I from the steam-generator, substantially as IO the lever, combined together and with hollow shown and described.

plug A, adapted for connection with the shell 5 of a vulcanizer, substantially as shown and WILLIAM GWYER' described. Witnesses 2. The combination, with governors for vul- GEO. D. WALKER,

canizers actuated by steam-pressure, of an an O. SEDGWIOK. 

